MATLAB: Function definitions are not permitted in this context.

function definitions

I am having this error "Function definitions are not permitted in this context." writing this

A = spdiags([-1 a11 0;ones(n-2,1)*[-1 2 -1];0 a11 -1],-1:1,n,n)'/h^2;

Best Answer

You have probably combined a function and a script in the same m-file. You can't do that. If your script is called test.m, and has MyFunction defined in it some where, then make sure this is the first line of your test.m

function test()

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MATLAB: Error: Function definitions are not permitted in this context.

You probably have that function below a script in your m-file. You can't mix a script and a function in the same file. You can have two functions though. So if your file is called test.m, you could have all this in the single file:

function test()
    area = calcarea(10)
end
function area = calcarea(rad)
    area = pi*rad.^2;
end

Or you could have them in two separate files:

A script in test.m:

area = calcarea(10)

A function in calcarea.m:

function area = calcarea(rad)
    area = pi*rad.^2;
end

MATLAB: Error: Function definitions are not permitted in this context.

It is never valid to copy and paste a "function" definition to the command line. It is also not valid to eval() a character vector that contains a "function" definition.

In releases up to R2015a, it was never valid to have a "function" definition inside a script file (a .m file in which the first executable word was not "function" and not "classdef"). In R2015b, it became legal to define functions inside of script files, provided that they were after the script, and provided that every "function" definition ended with a corresponding "end" statement.

Whether in functions or scripts, there are places where it is not valid to have a function definition. For example it is not valid to have a function definition inside a for loop or if statement.

if true
    function result = test      %invalid function
      result = 5;
    end
end

Best Answer

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MATLAB: Error: Function definitions are not permitted in this context.

MATLAB: Error: Function definitions are not permitted in this context.

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